linux-kernel - Re: [PROBLEM] ASUS Sandybridge motherboards + PCI not working (IRQ n: nobody cared)

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Date:	Wed, 14 Dec 2011 10:49:43 +0000
From:	Chris Palmer <chris.palmer@...ox.com>
To:	Edward Donovan <edward.donovan@...ble.net>
CC:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PROBLEM] ASUS Sandybridge motherboards + PCI not working (IRQ
 n: nobody cared)

Hi Edward
Thanks for the reply. See below...
Regards
Chris

On 14/12/2011 00:06, Edward Donovan wrote:
> Hi Chris -
>
> I will certainly take a look.  I don't have the hardware,
> unfortunately.  And
> this is kinda my first rodeo, kernel-wise, so don't let me sound too
> expert. :)
> Let me ask a couple questions, anyway.
>
> - Later, I'll have time to look for Andrew's message, but do you know
> -- did he
>   mean a firmware ACPI bug, or a Linux bug?

He didn't say.

>
> - Does 2.6.38 behave the same as 3.1.5 or the other newest kernels? 
> (If the
>   hardware doesn't require something newer than .38.)  There was an
> IRQ overhaul
>   in 2.6.39, and the two bugs I fixed were regressions from that
> work.  As of
>   now, the bad-irq handling seems equivalent to 2.6.38, but I should
> make sure
>   that goes for your problem, too.

I was on 2.6.39.2 when I purchased the motherboard, so can't personally
vouch for anything earlier. However other posters, who were on earlier
kernels, referred to the behaviour that I am now experiencing on 3.1.5 -
i.e. that the "nobody cared" fault occurs and the device then continues
to "work" but extremely slowly (from 2.6.39.2-3.1.4 it stops working
completely).

>
> I think I'll cc LKML, too, if you don't mind.  I've seen this topic
> going by,
> but don't know what's been said.  And maybe tomorrow I can get some
> pondering
> time -
>
> Ed
>
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